TY - JOUR AU - V. D. Chertok TI - Unattainable subgroups and the normal structure of finite groups JO - Doklady Akademii Nauk PY - 1967 SP - 282 EP - 284 VL - 173 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1967_173_2_a11/ LA - ru ID - DAN_1967_173_2_a11 ER -